What kind of settlement would i be looking at after carbon monoxide accident?

In March of '08, I suffered a Carbon Monoxide accident while on a job for a new customer in their restaurant. The short of it was they were open for business and I was in wine cellar next to boiler room where there was a leak. I found myself in the hospital the same day in hyberbaric chamber for 2 days. I have a filed a law suit. I have been treating now for 2 years mostly now for diagnosed PTSD,and short term memory loss. My question is, how much can me and my family really get? I have suffered this far with no end in sight.